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Quantitative trait locus effects and environmental interaction in a sample of North American barley germ plasm |
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| Authors: | P M Hayes B H Liu S J Knapp F Chen B Jones T Blake J Franckowiak D Rasmusson M Sorrells S E Ullrich D Wesenberg A Kleinhofs |
| Institution: | (1) Department of Crop and Soil Science, Oregon State University, 97331 Corvallis, OR, USA;(2) Department of Statistics, North Carolina State University, 27695 Raleigh, NC, USA;(3) USDA/ARS Cereal Crops Research Unit, 53705 Madison, WI, USA;(4) Department of Plant and Soil Sciences, Montana State University, 59715 Bozeman, MT, USA;(5) Department of Crop and Weed Sciences, North Dakota State University, 58105 Fargo, ND, USA;(6) Department of Agronomy and Plant Genetics, University of Minnesota, 55108 St. Paul, MN, USA;(7) Department of Plant Breeding, Cornell University, 14853 Ithaca, NY, USA;(8) Department of Crop and Soil Sciences, Washington State University, 99164 Pullman, WA, USA;(9) USDA/ARS, National Small Grains Germplasm Research Facility, 83210 Aberdeen, ID, USA |
| Abstract: | Quantitative trait locus (QTL) and QTL x environment (E) interaction effects for agronomic and malting quality traits were measured using a 123-point linkage map and multi-environment phenotype data from an F1-derived doubled haploid population of barley (Hordeum vulgare). The QTL × E interactions were due to differences in magnitude of QTL effects. Highly significant QTL effects were found for all traits at multiple sites in the genome. Yield QTL peaks and support intervals often coincided with plant height and lodging QTL peaks and support intervals. QTL were detected in the vicinity of a previously mapped Mendelian maturity locus and known function probes for - and -amylase genes. The average map density (9.6 cM) should be adequate for molecular marker-assisted selection, particularly since there were few cases of alternative favorable alleles for different traits mapping to the same or adjacent intervals.Oreg Agric Exp Stn J No. 10150 |
| Keywords: | QTL RFLP mapping marker-assisted selection Barley |
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